<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <div id="app">

    <h3>我是标题</h3>
    <!-- 手动指定路由组件的出口 -->
    <router-view></router-view>
  </div>
  <script src="./vue.js"></script>
  <script src="./vue-router.js"></script>
  <script>
    // 准备三个组件对象
    const Home = {
      template: `
        <div>
          <h2>我是首页</h2>  
        </div>
      `
    }
    const News = {
      template: `
        <div>
          <h2>我是新闻页</h2>  
        </div>
      `
    }
    const About = {
      template: `
        <div>
          <h2>我是关于我们页</h2>  
        </div>
      `
    }

    const routes = [
      {
        path: '/home',
        component: Home
      },
      {
        path: '/news',
        component: News
      },
      {
        path: '/about',
        component: About
      }
    ]
    // 创建路由实例
    const router = new VueRouter({
      // routes 路由规则 数组 有多个路由
      routes
    });
    // 将路由实例挂载到 vm上
    const vm = new Vue({
      el: '#app',
      router
    })
  </script>
</body>
</html>